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Glossy Swampsnake vs. Banded Watersnake

Both live in Gulf Coast swamps and marshes, including the Red River lowlands of far southeastern Oklahoma. A: A small, narrow head barely wider than the neck; yellow lips, each lip scale edged dark; no stripe from the eye in the Glossy Swampsnake; a broad head with a dark stripe from the eye to the corner of the jaw in the Banded Watersnake. B: Plain glossy olive-brown, faint stripes only in the Glossy Swampsnake; wide dark crossbands all the way down in the Banded Watersnake. C: Yellow with two neat rows of black half-moons in the Glossy Swampsnake; yellow to red with dark squarish spots or wavy marks in the Banded Watersnake.

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Glossy Swampsnake

Liodytes rigida

Banded Watersnake

Nerodia fasciata
Glossy Swampsnake vs. Banded Watersnake: comparison sheet with the differences marked

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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